[Glamor] [PATCH V3 2/3] Add the feature of generating linear gradient picture by using shader.
junyan.he at linux.intel.com
junyan.he at linux.intel.com
Thu Mar 22 13:05:56 PDT 2012
From: Junyan He <junyan.he at linux.intel.com>
Add the feature of generating linear gradient picture
by using shader. This logic will replace the original
linear gradient picture generating manner in glamor
which firstly use pixman and then upload it to GPU.
Compare it to the result generated by pixman, the
difference of each color component of each pixel is
normally 0, sometimes 1/255, and 2/255 at most. The
pixman use fix int but shader use float, so may have
difference. The feature of transform matrix and 4 types
of repeat modes have been supported. The array usage in
shader seems slow, so use 8 uniform variables to avoid
using array when stops number is not very big. This
make code look verbose but the performance improved a
lot.
---
src/glamor_render.c | 978 ++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 968 insertions(+), 10 deletions(-)
diff --git a/src/glamor_render.c b/src/glamor_render.c
index 093e01d..65b0ebf 100644
--- a/src/glamor_render.c
+++ b/src/glamor_render.c
@@ -1275,6 +1275,378 @@ done:
return ret;
}
+static GLint
+_glamor_create_linear_gradient_program(ScreenPtr screen, int stops_count, int use_array)
+{
+ glamor_screen_private *glamor_priv;
+ glamor_gl_dispatch *dispatch;
+
+ GLint gradient_prog = 0;
+ char *gradient_fs = NULL;
+ GLint fs_prog, vs_prog;
+
+ const char *gradient_vs =
+ GLAMOR_DEFAULT_PRECISION
+ "attribute vec4 v_position;\n"
+ "attribute vec4 v_texcoord;\n"
+ "varying vec2 source_texture;\n"
+ "\n"
+ "void main()\n"
+ "{\n"
+ " gl_Position = v_position;\n"
+ " source_texture = v_texcoord.xy;\n"
+ "}\n";
+
+ /*
+ * |
+ * |\
+ * | \
+ * | \
+ * | \
+ * |\ \
+ * | \ \
+ * cos_val = |\ p1d \ /
+ * sqrt(1/(slope*slope+1.0)) ------>\ \ \ /
+ * | \ \ \
+ * | \ \ / \
+ * | \ *Pt1\
+ * *p1 | \ \ *P
+ * \ | / \ \ /
+ * \ | / \ \ /
+ * \ | pd \
+ * \ | \ / \
+ * p2* | \ / \ /
+ * slope = (p2.y - p1.y) / | / p2d /
+ * (p2.x - p1.x) | / \ /
+ * | / \ /
+ * | / /
+ * | / /
+ * | / *Pt2
+ * | /
+ * | /
+ * | /
+ * | /
+ * | /
+ * -------+---------------------------------
+ * O|
+ * |
+ * |
+ *
+ * step 1: compute the distance of p, pt1 and pt2 in the slope direction.
+ * Caculate the distance on Y axis first and multiply cos_val to
+ * get the value on slope direction(pd, p1d and p2d represent the
+ * distance of p, pt1, and pt2 respectively).
+ *
+ * step 2: caculate the percentage of (pd - p1d)/(p2d - p1d).
+ * If (pd - p1d) > (p2d - p1d) or < 0, then sub or add (p2d - p1d)
+ * to make it in the range of [0, (p2d - p1d)].
+ *
+ * step 3: compare the percentage to every stop and find the stpos just
+ * before and after it. Use the interpolation fomula to compute RGBA.
+ */
+
+ const char *gradient_fs_template =
+ GLAMOR_DEFAULT_PRECISION
+ "uniform mat3 transform_mat;\n"
+ "uniform int repeat_type;\n"
+ "uniform int hor_ver;\n"
+ "uniform int n_stop;\n"
+ "uniform float stops[%d];\n"
+ "uniform vec4 stop_colors[%d];\n"
+ "uniform vec4 pt1;\n"
+ "uniform vec4 pt2;\n"
+ "uniform float pt_slope;\n"
+ "uniform float cos_val;\n"
+ "uniform float p1_distance;\n"
+ "uniform float pt_distance;\n"
+ "varying vec2 source_texture;\n"
+ "\n"
+ "vec4 get_color()\n"
+ "{\n"
+ " vec3 tmp = vec3(source_texture.x, source_texture.y, 1.0);\n"
+ " float len_percentage;\n"
+ " float distance;\n"
+ " float _p1_distance;\n"
+ " float _pt_distance;\n"
+ " float y_dist;\n"
+ " float new_alpha; \n"
+ " int i = n_stop - 1;\n"
+ " int revserse = 0;\n"
+ " vec4 gradient_color;\n"
+ " float percentage; \n"
+ " vec3 source_texture_trans = transform_mat * tmp;\n"
+ " \n"
+ " if(hor_ver == 0) { \n" //Normal case.
+ " y_dist = source_texture_trans.y - source_texture_trans.x*pt_slope;\n"
+ " distance = y_dist * cos_val;\n"
+ " _p1_distance = p1_distance * source_texture_trans.z;\n"
+ " _pt_distance = pt_distance * source_texture_trans.z;\n"
+ " \n"
+ " } else if (hor_ver == 1) {\n"//horizontal case.
+ " distance = source_texture_trans.x;\n"
+ " _p1_distance = p1_distance * source_texture_trans.z;\n"
+ " _pt_distance = pt_distance * source_texture_trans.z;\n"
+ " } else if (hor_ver == 2) {\n"//vertical case.
+ " distance = source_texture_trans.y;\n"
+ " _p1_distance = p1_distance * source_texture_trans.z;\n"
+ " _pt_distance = pt_distance * source_texture_trans.z;\n"
+ " } \n"
+ " \n"
+ " distance = distance - _p1_distance; \n"
+ " \n"
+ " if(repeat_type == %d){\n" // repeat normal
+ " while(distance > _pt_distance) \n"
+ " distance = distance - (_pt_distance); \n"
+ " while(distance < 0.0) \n"
+ " distance = distance + (_pt_distance); \n"
+ " }\n"
+ " \n"
+ " if(repeat_type == %d) {\n" // repeat reflect
+ " while(distance > _pt_distance) {\n"
+ " distance = distance - (_pt_distance); \n"
+ " if(revserse == 0)\n"
+ " revserse = 1;\n"
+ " else\n"
+ " revserse = 0;\n"
+ " }\n"
+ " while(distance < 0.0) {\n"
+ " distance = distance + (_pt_distance); \n"
+ " if(revserse == 0)\n"
+ " revserse = 1;\n"
+ " else\n"
+ " revserse = 0;\n"
+ " }\n"
+ " if(revserse == 1) {\n"
+ " distance = (_pt_distance) - distance; \n"
+ " }\n"
+ " }\n"
+ " \n"
+ " len_percentage = distance/(_pt_distance);\n"
+ " for(i = 0; i < n_stop - 1; i++) {\n"
+ " if(len_percentage < stops[i])\n"
+ " break; \n"
+ " }\n"
+ " \n"
+ " percentage = (len_percentage - stops[i-1])/(stops[i] - stops[i-1]);\n"
+ " if(stops[i] - stops[i-1] > 2.0)\n"
+ " percentage = 0.0;\n" //For comply with pixman, walker->stepper overflow.
+ " new_alpha = percentage * stop_colors[i].a + \n"
+ " (1.0-percentage) * stop_colors[i-1].a; \n"
+ " gradient_color = vec4((percentage * stop_colors[i].rgb \n"
+ " + (1.0-percentage) * stop_colors[i-1].rgb)*new_alpha, \n"
+ " new_alpha);\n"
+ " \n"
+ " return gradient_color;\n"
+ "}\n"
+ "\n"
+ "void main()\n"
+ "{\n"
+ " gl_FragColor = get_color();\n"
+ "}\n";
+
+ /* Because the array access for shader is very slow, the performance is very low
+ if use array. So use global uniform to replace for it if the number of n_stops is small.*/
+ const char *gradient_fs_no_array_template =
+ GLAMOR_DEFAULT_PRECISION
+ "uniform mat3 transform_mat;\n"
+ "uniform int repeat_type;\n"
+ "uniform int hor_ver;\n"
+ "uniform int n_stop;\n"
+ "uniform float stop0;\n"
+ "uniform float stop1;\n"
+ "uniform float stop2;\n"
+ "uniform float stop3;\n"
+ "uniform float stop4;\n"
+ "uniform float stop5;\n"
+ "uniform float stop6;\n"
+ "uniform float stop7;\n"
+ "uniform vec4 stop_color0;\n"
+ "uniform vec4 stop_color1;\n"
+ "uniform vec4 stop_color2;\n"
+ "uniform vec4 stop_color3;\n"
+ "uniform vec4 stop_color4;\n"
+ "uniform vec4 stop_color5;\n"
+ "uniform vec4 stop_color6;\n"
+ "uniform vec4 stop_color7;\n"
+ "uniform vec4 pt1;\n"
+ "uniform vec4 pt2;\n"
+ "uniform float pt_slope;\n"
+ "uniform float cos_val;\n"
+ "uniform float p1_distance;\n"
+ "uniform float pt_distance;\n"
+ "varying vec2 source_texture;\n"
+ "\n"
+ "vec4 get_color()\n"
+ "{\n"
+ " vec3 tmp = vec3(source_texture.x, source_texture.y, 1.0);\n"
+ " float len_percentage;\n"
+ " float distance;\n"
+ " float _p1_distance;\n"
+ " float _pt_distance;\n"
+ " float y_dist;\n"
+ " float stop_after;\n"
+ " float stop_before;\n"
+ " vec4 stop_color_before;\n"
+ " vec4 stop_color_after;\n"
+ " float new_alpha; \n"
+ " int revserse = 0;\n"
+ " vec4 gradient_color;\n"
+ " float percentage; \n"
+ " vec3 source_texture_trans = transform_mat * tmp;\n"
+ " \n"
+ " if(hor_ver == 0) { \n" //Normal case.
+ " y_dist = source_texture_trans.y - source_texture_trans.x*pt_slope;\n"
+ " distance = y_dist * cos_val;\n"
+ " _p1_distance = p1_distance * source_texture_trans.z;\n"
+ " _pt_distance = pt_distance * source_texture_trans.z;\n"
+ " \n"
+ " } else if (hor_ver == 1) {\n"//horizontal case.
+ " distance = source_texture_trans.x;\n"
+ " _p1_distance = p1_distance * source_texture_trans.z;\n"
+ " _pt_distance = pt_distance * source_texture_trans.z;\n"
+ " } else if (hor_ver == 2) {\n"//vertical case.
+ " distance = source_texture_trans.y;\n"
+ " _p1_distance = p1_distance * source_texture_trans.z;\n"
+ " _pt_distance = pt_distance * source_texture_trans.z;\n"
+ " } \n"
+ " \n"
+ " distance = distance - _p1_distance; \n"
+ " \n"
+ " if(repeat_type == %d){\n" // repeat normal
+ " while(distance > _pt_distance) \n"
+ " distance = distance - (_pt_distance); \n"
+ " while(distance < 0.0) \n"
+ " distance = distance + (_pt_distance); \n"
+ " }\n"
+ " \n"
+ " if(repeat_type == %d) {\n" // repeat reflect
+ " while(distance > _pt_distance) {\n"
+ " distance = distance - (_pt_distance); \n"
+ " if(revserse == 0)\n"
+ " revserse = 1;\n"
+ " else\n"
+ " revserse = 0;\n"
+ " }\n"
+ " while(distance < 0.0) {\n"
+ " distance = distance + (_pt_distance); \n"
+ " if(revserse == 0)\n"
+ " revserse = 1;\n"
+ " else\n"
+ " revserse = 0;\n"
+ " }\n"
+ " if(revserse == 1) {\n"
+ " distance = (_pt_distance) - distance; \n"
+ " }\n"
+ " }\n"
+ " \n"
+ " len_percentage = distance/(_pt_distance);\n"
+ " if((len_percentage < stop0) && (n_stop >= 1)) {\n"
+ " stop_color_before = stop_color0;\n"
+ " stop_color_after = stop_color0;\n"
+ " stop_after = stop0;\n"
+ " stop_before = stop0;\n"
+ " percentage = 0.0;\n"
+ " } else if((len_percentage < stop1) && (n_stop >= 2)) {\n"
+ " stop_color_before = stop_color0;\n"
+ " stop_color_after = stop_color1;\n"
+ " stop_after = stop1;\n"
+ " stop_before = stop0;\n"
+ " percentage = (len_percentage - stop0)/(stop1 - stop0);\n"
+ " } else if((len_percentage < stop2) && (n_stop >= 3)) {\n"
+ " stop_color_before = stop_color1;\n"
+ " stop_color_after = stop_color2;\n"
+ " stop_after = stop2;\n"
+ " stop_before = stop1;\n"
+ " percentage = (len_percentage - stop1)/(stop2 - stop1);\n"
+ " } else if((len_percentage < stop3) && (n_stop >= 4)){\n"
+ " stop_color_before = stop_color2;\n"
+ " stop_color_after = stop_color3;\n"
+ " stop_after = stop3;\n"
+ " stop_before = stop2;\n"
+ " percentage = (len_percentage - stop2)/(stop3 - stop2);\n"
+ " } else if((len_percentage < stop4) && (n_stop >= 5)){\n"
+ " stop_color_before = stop_color3;\n"
+ " stop_color_after = stop_color4;\n"
+ " stop_after = stop4;\n"
+ " stop_before = stop3;\n"
+ " percentage = (len_percentage - stop3)/(stop4 - stop3);\n"
+ " } else if((len_percentage < stop5) && (n_stop >= 6)){\n"
+ " stop_color_before = stop_color4;\n"
+ " stop_color_after = stop_color5;\n"
+ " stop_after = stop5;\n"
+ " stop_before = stop4;\n"
+ " percentage = (len_percentage - stop4)/(stop5 - stop4);\n"
+ " } else if((len_percentage < stop6) && (n_stop >= 7)){\n"
+ " stop_color_before = stop_color5;\n"
+ " stop_color_after = stop_color6;\n"
+ " stop_after = stop6;\n"
+ " stop_before = stop5;\n"
+ " percentage = (len_percentage - stop5)/(stop6 - stop5);\n"
+ " } else if((len_percentage < stop7) && (n_stop >= 8)){\n"
+ " stop_color_before = stop_color6;\n"
+ " stop_color_after = stop_color7;\n"
+ " stop_after = stop7;\n"
+ " stop_before = stop6;\n"
+ " percentage = (len_percentage - stop6)/(stop7 - stop6);\n"
+ " } else {\n"
+ " stop_color_before = stop_color7;\n"
+ " stop_color_after = stop_color7;\n"
+ " stop_after = stop7;\n"
+ " stop_before = stop7;\n"
+ " percentage = 0.0;\n"
+ " }\n"
+ " if(stop_after - stop_before > 2.0)\n"
+ " percentage = 0.0;\n"//For comply with pixman, walker->stepper overflow.
+ " new_alpha = percentage * stop_color_after.a + \n"
+ " (1.0-percentage) * stop_color_before.a; \n"
+ " gradient_color = vec4((percentage * stop_color_after.rgb \n"
+ " + (1.0-percentage) * stop_color_before.rgb)*new_alpha, \n"
+ " new_alpha);\n"
+ " \n"
+ " return gradient_color;\n"
+ "}\n"
+ "\n"
+ "void main()\n"
+ "{\n"
+ " gl_FragColor = get_color();\n"
+ "}\n";
+
+ glamor_priv = glamor_get_screen_private(screen);
+ dispatch = glamor_get_dispatch(glamor_priv);
+
+ gradient_prog = dispatch->glCreateProgram();
+
+ vs_prog = glamor_compile_glsl_prog(dispatch,
+ GL_VERTEX_SHADER, gradient_vs);
+
+ if (use_array) {
+ XNFasprintf(&gradient_fs,
+ gradient_fs_template, stops_count, stops_count,
+ PIXMAN_REPEAT_NORMAL, PIXMAN_REPEAT_REFLECT);
+ } else {
+ XNFasprintf(&gradient_fs,
+ gradient_fs_no_array_template,
+ PIXMAN_REPEAT_NORMAL, PIXMAN_REPEAT_REFLECT);
+ }
+ fs_prog = glamor_compile_glsl_prog(dispatch,
+ GL_FRAGMENT_SHADER, gradient_fs);
+ free(gradient_fs);
+
+ dispatch->glAttachShader(gradient_prog, vs_prog);
+ dispatch->glAttachShader(gradient_prog, fs_prog);
+
+ dispatch->glBindAttribLocation(gradient_prog, GLAMOR_VERTEX_POS, "v_position");
+ dispatch->glBindAttribLocation(gradient_prog, GLAMOR_VERTEX_SOURCE, "v_texcoord");
+
+ glamor_link_glsl_prog(dispatch, gradient_prog);
+
+ dispatch->glUseProgram(0);
+
+ glamor_put_dispatch(glamor_priv);
+ return gradient_prog;
+}
+
+#define LINEAR_DEFAULT_STOPS 6 + 2
void
glamor_init_gradient_shader(ScreenPtr screen)
@@ -1283,6 +1655,9 @@ glamor_init_gradient_shader(ScreenPtr screen)
glamor_priv = glamor_get_screen_private(screen);
+ glamor_priv->gradient_prog[GRADIENT_SHADER_LINEAR] =
+ _glamor_create_linear_gradient_program(screen,
+ LINEAR_DEFAULT_STOPS, 0);
}
void
@@ -1294,17 +1669,584 @@ glamor_fini_gradient_shader(ScreenPtr screen)
glamor_priv = glamor_get_screen_private(screen);
dispatch = glamor_get_dispatch(glamor_priv);
+ dispatch->glDeleteProgram(
+ glamor_priv->gradient_prog[GRADIENT_SHADER_LINEAR]);
+
+ glamor_put_dispatch(glamor_priv);
+}
+
+static void
+_glamor_gradient_convert_trans_matrix(PictTransform *from, float to[3][3],
+ int width, int height)
+{
+ /*
+ * Because in the shader program, we normalize all the pixel cood to [0, 1],
+ * so with the transform matrix, the correct logic should be:
+ * v_s = A*T*v
+ * v_s: point vector in shader after normalized.
+ * A: The transition matrix from width X height --> 1.0 X 1.0
+ * T: The transform matrix.
+ * v: point vector in width X height space.
+ *
+ * result is OK if we use this fomula. But for every point in width X height space,
+ * we can just use their normalized point vector in shader, namely we can just
+ * use the result of A*v in shader. So we have no chance to insert T in A*v.
+ * We can just convert v_s = A*T*v to v_s = A*T*inv(A)*A*v, where inv(A) is the
+ * inverse matrix of A. Now, v_s = (A*T*inv(A)) * (A*v)
+ * So, to get the correct v_s, we need to cacula1 the matrix: (A*T*inv(A)), and
+ * we name this matrix T_s.
+ *
+ * Firstly, because A is for the scale convertion, we find
+ * -- --
+ * |1/w 0 0 |
+ * A = | 0 1/h 0 |
+ * | 0 0 1.0|
+ * -- --
+ * so T_s = A*T*inv(a) and result
+ *
+ * -- --
+ * | t11 h*t12/w t13/w|
+ * T_s = | w*t21/h t22 t23/h|
+ * | w*t31 h*t32 t33 |
+ * -- --
+ */
+
+ to[0][0] = (float)pixman_fixed_to_double(from->matrix[0][0]);
+ to[0][1] = (float)pixman_fixed_to_double(from->matrix[0][1])
+ * ((float)height) / ((float)width);
+ to[0][2] = (float)pixman_fixed_to_double(from->matrix[0][2])
+ / ((float)width);
+
+ to[1][0] = (float)pixman_fixed_to_double(from->matrix[1][0])
+ * ((float)width) / ((float)height);
+ to[1][1] = (float)pixman_fixed_to_double(from->matrix[1][1]);
+ to[1][2] = (float)pixman_fixed_to_double(from->matrix[1][2])
+ / ((float)height);
+
+ to[2][0] = (float)pixman_fixed_to_double(from->matrix[2][0])
+ * ((float)width);
+ to[2][1] = (float)pixman_fixed_to_double(from->matrix[2][1])
+ * ((float)height);
+ to[2][2] = (float)pixman_fixed_to_double(from->matrix[2][2]);
+
+ DEBUGF("the transform matrix is:\n%f\t%f\t%f\n%f\t%f\t%f\n%f\t%f\t%f\n",
+ to[0][0], to[0][1], to[0][2],
+ to[1][0], to[1][1], to[1][2],
+ to[2][0], to[2][1], to[2][2]);
+}
+
+static int
+_glamor_gradient_set_pixmap_distination(ScreenPtr screen,
+ glamor_screen_private *glamor_priv,
+ PicturePtr dst_picure,
+ GLfloat *xscale, GLfloat *yscale,
+ int x_source, int y_source,
+ float vertices[8],
+ float tex_vertices[8],
+ int tex_normalize)
+{
+ glamor_pixmap_private *pixmap_priv;
+ PixmapPtr pixmap = NULL;
+
+ pixmap = glamor_get_drawable_pixmap(dst_picure->pDrawable);
+ pixmap_priv = glamor_get_pixmap_private(pixmap);
+
+ if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv)) { /* should always have here. */
+ return 0;
+ }
+
+ glamor_set_destination_pixmap_priv_nc(pixmap_priv);
+
+ pixmap_priv_get_scale(pixmap_priv, xscale, yscale);
+
+ glamor_priv->has_source_coords = 1;
+ glamor_priv->has_mask_coords = 0;
+ glamor_setup_composite_vbo(screen, 4*2);
+
+ DEBUGF("xscale = %f, yscale = %f,"
+ " x_source = %d, y_source = %d, width = %d, height = %d\n",
+ *xscale, *yscale, x_source, y_source,
+ pixmap_priv->fbo->width, pixmap_priv->fbo->height);
+
+ glamor_set_normalize_vcoords(*xscale, *yscale,
+ 0, 0,
+ (INT16)(pixmap_priv->fbo->width),
+ (INT16)(pixmap_priv->fbo->height),
+ glamor_priv->yInverted, vertices);
+
+ if (tex_normalize) {
+ glamor_set_normalize_tcoords(*xscale, *yscale,
+ 0, 0,
+ (INT16)(pixmap_priv->fbo->width),
+ (INT16)(pixmap_priv->fbo->height),
+ glamor_priv->yInverted, tex_vertices);
+ } else {
+ glamor_set_tcoords(0, 0,
+ (INT16)(pixmap_priv->fbo->width),
+ (INT16)(pixmap_priv->fbo->height),
+ glamor_priv->yInverted, tex_vertices);
+ }
+
+ DEBUGF("vertices --> leftup : %f X %f, rightup: %f X %f,"
+ "rightbottom: %f X %f, leftbottom : %f X %f\n",
+ vertices[0], vertices[1], vertices[2], vertices[3],
+ vertices[4], vertices[5], vertices[6], vertices[7]);
+ DEBUGF("tex_vertices --> leftup : %f X %f, rightup: %f X %f,"
+ "rightbottom: %f X %f, leftbottom : %f X %f\n",
+ tex_vertices[0], tex_vertices[1], tex_vertices[2], tex_vertices[3],
+ tex_vertices[4], tex_vertices[5], tex_vertices[6], tex_vertices[7]);
+
+ return 1;
+}
+
+static int
+_glamor_gradient_set_stops(PicturePtr src_picture, PictGradient * pgradient,
+ GLfloat *stop_colors, GLfloat *n_stops)
+{
+ int i;
+ int count;
+
+ for (i = 1; i < pgradient->nstops + 1; i++) {
+ stop_colors[i*4] = pixman_fixed_to_double(
+ pgradient->stops[i-1].color.red);
+ stop_colors[i*4+1] = pixman_fixed_to_double(
+ pgradient->stops[i-1].color.green);
+ stop_colors[i*4+2] = pixman_fixed_to_double(
+ pgradient->stops[i-1].color.blue);
+ stop_colors[i*4+3] = pixman_fixed_to_double(
+ pgradient->stops[i-1].color.alpha);
+
+ n_stops[i] = (GLfloat)pixman_fixed_to_double(
+ pgradient->stops[i-1].x);
+ }
+
+ count = pgradient->nstops + 2;
+
+ switch (src_picture->repeatType) {
+#define REPEAT_FILL_STOPS(m, n) \
+ stop_colors[(m)*4 + 0] = stop_colors[(n)*4 + 0]; \
+ stop_colors[(m)*4 + 1] = stop_colors[(n)*4 + 1]; \
+ stop_colors[(m)*4 + 2] = stop_colors[(n)*4 + 2]; \
+ stop_colors[(m)*4 + 3] = stop_colors[(n)*4 + 3];
+
+ default:
+ case PIXMAN_REPEAT_NONE:
+ stop_colors[0] = 0.0; //R
+ stop_colors[1] = 0.0; //G
+ stop_colors[2] = 0.0; //B
+ stop_colors[3] = 0.0; //Alpha
+ n_stops[0] = -(float)INT_MAX; //should be small enough.
+
+ stop_colors[0 + (count-1)*4] = 0.0; //R
+ stop_colors[1 + (count-1)*4] = 0.0; //G
+ stop_colors[2 + (count-1)*4] = 0.0; //B
+ stop_colors[3 + (count-1)*4] = 0.0; //Alpha
+ n_stops[count-1] = (float)INT_MAX; //should be large enough.
+ break;
+ case PIXMAN_REPEAT_NORMAL:
+ REPEAT_FILL_STOPS(0, count - 2);
+ n_stops[0] = n_stops[count-2] - 1.0;
+
+ REPEAT_FILL_STOPS(count - 1, 1);
+ n_stops[count-1] = n_stops[1] + 1.0;
+ break;
+ case PIXMAN_REPEAT_REFLECT:
+ REPEAT_FILL_STOPS(0, 1);
+ n_stops[0] = -n_stops[1];
+
+ REPEAT_FILL_STOPS(count - 1, count - 2);
+ n_stops[count-1] = 1.0 + 1.0 - n_stops[count-2];
+ break;
+ case PIXMAN_REPEAT_PAD:
+ REPEAT_FILL_STOPS(0, 1);
+ n_stops[0] = -(float)INT_MAX;
+
+ REPEAT_FILL_STOPS(count - 1, count - 2);
+ n_stops[count-1] = (float)INT_MAX;
+ break;
+#undef REPEAT_FILL_STOPS
+ }
+
+ for (i = 0; i < count; i++) {
+ DEBUGF("n_stops[%d] = %f, color = r:%f g:%f b:%f a:%f\n",
+ i, n_stops[i],
+ stop_colors[i*4], stop_colors[i*4+1],
+ stop_colors[i*4+2], stop_colors[i*4+3]);
+ }
+
+ return count;
+}
+
+static PicturePtr
+_glamor_generate_linear_gradient_picture(ScreenPtr screen,
+ PicturePtr src_picture,
+ int x_source, int y_source,
+ int width, int height,
+ PictFormatShort format)
+{
+ glamor_screen_private *glamor_priv;
+ glamor_gl_dispatch *dispatch;
+ PicturePtr dst_picture = NULL;
+ PixmapPtr pixmap = NULL;
+ GLint gradient_prog = 0;
+ int error;
+ float pt_distance;
+ float p1_distance;
+ GLfloat cos_val;
+ float tex_vertices[8];
+ int stops_count;
+ GLfloat *stop_colors = NULL;
+ GLfloat *n_stops = NULL;
+ int i = 0;
+ int count = 0;
+ float slope;
+ GLfloat xscale, yscale;
+ GLfloat pt1[4], pt2[4];
+ float vertices[8];
+ float transform_mat[3][3];
+ static const float identity_mat[3][3] = {{1.0, 0.0, 0.0},
+ {0.0, 1.0, 0.0},
+ {0.0, 0.0, 1.0}};
+ GLfloat stop_colors_st[LINEAR_DEFAULT_STOPS*4];
+ GLfloat n_stops_st[LINEAR_DEFAULT_STOPS];
+
+ GLint transform_mat_uniform_location;
+ GLint pt1_uniform_location;
+ GLint pt2_uniform_location;
+ GLint n_stop_uniform_location;
+ GLint stops_uniform_location;
+ GLint stop0_uniform_location;
+ GLint stop1_uniform_location;
+ GLint stop2_uniform_location;
+ GLint stop3_uniform_location;
+ GLint stop4_uniform_location;
+ GLint stop5_uniform_location;
+ GLint stop6_uniform_location;
+ GLint stop7_uniform_location;
+ GLint stop_colors_uniform_location;
+ GLint stop_color0_uniform_location;
+ GLint stop_color1_uniform_location;
+ GLint stop_color2_uniform_location;
+ GLint stop_color3_uniform_location;
+ GLint stop_color4_uniform_location;
+ GLint stop_color5_uniform_location;
+ GLint stop_color6_uniform_location;
+ GLint stop_color7_uniform_location;
+ GLint pt_slope_uniform_location;
+ GLint repeat_type_uniform_location;
+ GLint hor_ver_uniform_location;
+ GLint cos_val_uniform_location;
+ GLint p1_distance_uniform_location;
+ GLint pt_distance_uniform_location;
+
+ glamor_priv = glamor_get_screen_private(screen);
+ dispatch = glamor_get_dispatch(glamor_priv);
+
+ /* Create a pixmap with VBO. */
+ pixmap = glamor_create_pixmap(screen,
+ width, height,
+ PIXMAN_FORMAT_DEPTH(format),
+ GLAMOR_CREATE_PIXMAP_FIXUP);
+
+ if (!pixmap)
+ goto GRADIENT_FAIL;
+
+ dst_picture = CreatePicture(0, &pixmap->drawable,
+ PictureMatchFormat(screen,
+ PIXMAN_FORMAT_DEPTH(format), format),
+ 0, 0, serverClient, &error);
+
+ /* Release the reference, picture will hold the last one. */
+ glamor_destroy_pixmap(pixmap);
+
+ if (!dst_picture)
+ goto GRADIENT_FAIL;
+
+ ValidatePicture(dst_picture);
+
+ stops_count = src_picture->pSourcePict->linear.nstops + 2 > LINEAR_DEFAULT_STOPS ?
+ src_picture->pSourcePict->linear.nstops + 2 : LINEAR_DEFAULT_STOPS;
+
+ /* Because the max value of nstops is unkown, so create a program
+ when nstops > default.*/
+ if (src_picture->pSourcePict->linear.nstops + 2 <= LINEAR_DEFAULT_STOPS) {
+ gradient_prog = glamor_priv->gradient_prog[GRADIENT_SHADER_LINEAR];
+ } else {
+ gradient_prog = _glamor_create_linear_gradient_program(screen,
+ src_picture->pSourcePict->linear.nstops + 2, 1);
+ }
+
+ /* Bind all the uniform vars .*/
+ pt1_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "pt1");
+ pt2_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "pt2");
+ n_stop_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "n_stop");
+ pt_slope_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "pt_slope");
+ repeat_type_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "repeat_type");
+ hor_ver_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "hor_ver");
+ transform_mat_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "transform_mat");
+ cos_val_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "cos_val");
+ p1_distance_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "p1_distance");
+ pt_distance_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "pt_distance");
+
+ if (src_picture->pSourcePict->linear.nstops + 2 <= LINEAR_DEFAULT_STOPS) {
+ stop0_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop0");
+ stop1_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop1");
+ stop2_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop2");
+ stop3_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop3");
+ stop4_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop4");
+ stop5_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop5");
+ stop6_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop6");
+ stop7_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop7");
+
+ stop_color0_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop_color0");
+ stop_color1_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop_color1");
+ stop_color2_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop_color2");
+ stop_color3_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop_color3");
+ stop_color4_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop_color4");
+ stop_color5_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop_color5");
+ stop_color6_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop_color6");
+ stop_color7_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop_color7");
+ } else {
+ stops_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stops");
+ stop_colors_uniform_location =
+ dispatch->glGetUniformLocation(gradient_prog, "stop_colors");
+ }
+
+ dispatch->glUseProgram(gradient_prog);
+
+ dispatch->glUniform1i(repeat_type_uniform_location, src_picture->repeatType);
+
+ if (src_picture->transform) {
+ _glamor_gradient_convert_trans_matrix(src_picture->transform,
+ transform_mat,
+ width, height);
+ dispatch->glUniformMatrix3fv(transform_mat_uniform_location,
+ 1, 1, &transform_mat[0][0]);
+ } else {
+ dispatch->glUniformMatrix3fv(transform_mat_uniform_location,
+ 1, 1, &identity_mat[0][0]);
+ }
+
+ if (!_glamor_gradient_set_pixmap_distination(screen, glamor_priv, dst_picture,
+ &xscale, &yscale, x_source, y_source,
+ vertices, tex_vertices, 1))
+ goto GRADIENT_FAIL;
+
+ /* Normalize the PTs. */
+ glamor_set_normalize_pt(xscale, yscale,
+ pixman_fixed_to_int(src_picture->pSourcePict->linear.p1.x),
+ x_source,
+ pixman_fixed_to_int(src_picture->pSourcePict->linear.p1.y),
+ y_source,
+ glamor_priv->yInverted,
+ pt1);
+ dispatch->glUniform4fv(pt1_uniform_location, 1, pt1);
+ DEBUGF("pt1:(%f %f)\n", pt1[0], pt1[1]);
+
+ glamor_set_normalize_pt(xscale, yscale,
+ pixman_fixed_to_int(src_picture->pSourcePict->linear.p2.x),
+ x_source,
+ pixman_fixed_to_int(src_picture->pSourcePict->linear.p2.y),
+ y_source,
+ glamor_priv->yInverted,
+ pt2);
+ dispatch->glUniform4fv(pt2_uniform_location, 1, pt2);
+ DEBUGF("pt2:(%f %f)\n", pt2[0], pt2[1]);
+
+ /* Set all the stops and colors to shader. */
+ if (stops_count > LINEAR_DEFAULT_STOPS) {
+ stop_colors = malloc(4 * stops_count * sizeof(float));
+ if (stop_colors == NULL) {
+ ErrorF("Failed to allocate stop_colors memory.\n");
+ goto GRADIENT_FAIL;
+ }
+
+ n_stops = malloc(stops_count * sizeof(float));
+ if (n_stops == NULL) {
+ ErrorF("Failed to allocate n_stops memory.\n");
+ goto GRADIENT_FAIL;
+ }
+ } else {
+ stop_colors = stop_colors_st;
+ n_stops = n_stops_st;
+ }
+
+ count = _glamor_gradient_set_stops(src_picture, &src_picture->pSourcePict->gradient,
+ stop_colors, n_stops);
+
+ if (src_picture->pSourcePict->linear.nstops + 2 <= LINEAR_DEFAULT_STOPS) {
+ int j = 0;
+ dispatch->glUniform4f(stop_color0_uniform_location, stop_colors[4*j+0], stop_colors[4*j+1],
+ stop_colors[4*j+2], stop_colors[4*j+3]);
+ j++;
+ dispatch->glUniform4f(stop_color1_uniform_location, stop_colors[4*j+0], stop_colors[4*j+1],
+ stop_colors[4*j+2], stop_colors[4*j+3]);
+ j++;
+ dispatch->glUniform4f(stop_color2_uniform_location, stop_colors[4*j+0], stop_colors[4*j+1],
+ stop_colors[4*j+2], stop_colors[4*j+3]);
+ j++;
+ dispatch->glUniform4f(stop_color3_uniform_location, stop_colors[4*j+0], stop_colors[4*j+1],
+ stop_colors[4*j+2], stop_colors[4*j+3]);
+ j++;
+ dispatch->glUniform4f(stop_color4_uniform_location, stop_colors[4*j+0], stop_colors[4*j+1],
+ stop_colors[4*j+2], stop_colors[4*j+3]);
+ j++;
+ dispatch->glUniform4f(stop_color5_uniform_location, stop_colors[4*j+0], stop_colors[4*j+1],
+ stop_colors[4*j+2], stop_colors[4*j+3]);
+ j++;
+ dispatch->glUniform4f(stop_color6_uniform_location, stop_colors[4*j+0], stop_colors[4*j+1],
+ stop_colors[4*j+2], stop_colors[4*j+3]);
+ j++;
+ dispatch->glUniform4f(stop_color7_uniform_location, stop_colors[4*j+0], stop_colors[4*j+1],
+ stop_colors[4*j+2], stop_colors[4*j+3]);
+
+ j = 0;
+ dispatch->glUniform1f(stop0_uniform_location, n_stops[j++]);
+ dispatch->glUniform1f(stop1_uniform_location, n_stops[j++]);
+ dispatch->glUniform1f(stop2_uniform_location, n_stops[j++]);
+ dispatch->glUniform1f(stop3_uniform_location, n_stops[j++]);
+ dispatch->glUniform1f(stop4_uniform_location, n_stops[j++]);
+ dispatch->glUniform1f(stop5_uniform_location, n_stops[j++]);
+ dispatch->glUniform1f(stop6_uniform_location, n_stops[j++]);
+ dispatch->glUniform1f(stop7_uniform_location, n_stops[j++]);
+
+ dispatch->glUniform1i(n_stop_uniform_location, count);
+ } else {
+ dispatch->glUniform4fv(stop_colors_uniform_location, count, stop_colors);
+ dispatch->glUniform1fv(stops_uniform_location, count, n_stops);
+ dispatch->glUniform1i(n_stop_uniform_location, count);
+ }
+
+ if ((pt2[1] - pt1[1]) / yscale < 1.0) { // The horizontal case.
+ dispatch->glUniform1i(hor_ver_uniform_location, 1);
+ DEBUGF("p1.x: %f, p2.x: %f, enter the horizontal case\n", pt1[1], pt2[1]);
+
+ p1_distance = pt1[0];
+ pt_distance = (pt2[0] - p1_distance);
+ dispatch->glUniform1f(p1_distance_uniform_location, p1_distance);
+ dispatch->glUniform1f(pt_distance_uniform_location, pt_distance);
+ } else if ((pt2[0] - pt1[0]) / xscale < 1.0) { //The vertical case.
+ dispatch->glUniform1i(hor_ver_uniform_location, 2);
+ DEBUGF("p1.y: %f, p2.y: %f, enter the vertical case\n", pt1[0], pt2[0]);
+
+ p1_distance = pt1[1];
+ pt_distance = (pt2[1] - p1_distance);
+ dispatch->glUniform1f(p1_distance_uniform_location, p1_distance);
+ dispatch->glUniform1f(pt_distance_uniform_location, pt_distance);
+ } else {
+ /* The slope need to compute here. In shader, the viewport set will change
+ the orginal slope and the slope which is vertical to it will not be correct.*/
+ slope = - (float)(src_picture->pSourcePict->linear.p2.x - src_picture->pSourcePict->linear.p1.x) /
+ (float)(src_picture->pSourcePict->linear.p2.y - src_picture->pSourcePict->linear.p1.y);
+ slope = slope * yscale / xscale;
+ dispatch->glUniform1f(pt_slope_uniform_location, slope);
+ dispatch->glUniform1i(hor_ver_uniform_location, 0);
+
+ cos_val = sqrt(1.0 / (slope * slope + 1.0));
+ dispatch->glUniform1f(cos_val_uniform_location, cos_val);
+
+ p1_distance = (pt1[1] - pt1[0] * slope) * cos_val;
+ pt_distance = (pt2[1] - pt2[0] * slope) * cos_val - p1_distance;
+ dispatch->glUniform1f(p1_distance_uniform_location, p1_distance);
+ dispatch->glUniform1f(pt_distance_uniform_location, pt_distance);
+ }
+
+ /* set the transform matrix. */ /* Now rendering. */
+ glamor_emit_composite_rect(screen, tex_vertices, NULL, vertices);
+
+ if (glamor_priv->render_nr_verts) {
+ if (glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP)
+ dispatch->glUnmapBuffer(GL_ARRAY_BUFFER);
+ else {
+
+ dispatch->glBindBuffer(GL_ARRAY_BUFFER, glamor_priv->vbo);
+ dispatch->glBufferData(GL_ARRAY_BUFFER,
+ glamor_priv->vbo_offset,
+ glamor_priv->vb, GL_DYNAMIC_DRAW);
+ }
+
+ dispatch->glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, NULL);
+ }
+
+ /* Do the clear logic.*/
+ if (stops_count > LINEAR_DEFAULT_STOPS) {
+ free(n_stops);
+ free(stop_colors);
+ }
+
+ dispatch->glBindBuffer(GL_ARRAY_BUFFER, 0);
+ dispatch->glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+
+ dispatch->glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
+ dispatch->glDisableVertexAttribArray(GLAMOR_VERTEX_SOURCE);
+ dispatch->glUseProgram(0);
+
+ if (src_picture->pSourcePict->linear.nstops + 2 > LINEAR_DEFAULT_STOPS)
+ dispatch->glDeleteProgram(gradient_prog);
+
glamor_put_dispatch(glamor_priv);
+ return dst_picture;
+
+GRADIENT_FAIL:
+ if (dst_picture) {
+ FreePicture(dst_picture, 0);
+ }
+
+ if (stops_count > LINEAR_DEFAULT_STOPS) {
+ if (n_stops)
+ free(n_stops);
+ if (stop_colors)
+ free(stop_colors);
+ }
+
+ dispatch->glBindBuffer(GL_ARRAY_BUFFER, 0);
+ dispatch->glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+
+ dispatch->glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
+ dispatch->glDisableVertexAttribArray(GLAMOR_VERTEX_SOURCE);
+ dispatch->glUseProgram(0);
+ if (src_picture->pSourcePict->linear.nstops + 2 > LINEAR_DEFAULT_STOPS)
+ dispatch->glDeleteProgram(gradient_prog);
+ glamor_put_dispatch(glamor_priv);
+ return NULL;
}
+#undef LINEAR_DEFAULT_STOPS
static PicturePtr
glamor_convert_gradient_picture(ScreenPtr screen,
- PicturePtr source,
- int x_source,
- int y_source, int width, int height)
+ PicturePtr source,
+ int x_source,
+ int y_source, int width, int height)
{
PixmapPtr pixmap;
- PicturePtr dst;
+ PicturePtr dst = NULL;
int error;
PictFormatShort format;
if (!source->pDrawable)
@@ -1312,6 +2254,22 @@ glamor_convert_gradient_picture(ScreenPtr screen,
else
format = source->format;
+ if (!source->pDrawable) {
+ if (source->pSourcePict->type == SourcePictTypeLinear) {
+ dst = _glamor_generate_linear_gradient_picture(screen,
+ source, x_source, y_source, width, height, format);
+ }
+
+ if (dst) {
+#if 0 /* Debug to compare it to pixman, Enable it if needed. */
+ glamor_compare_pictures(screen, source,
+ dst, x_source, y_source, width, height,
+ 0, 3);
+#endif
+ return dst;
+ }
+ }
+
pixmap = glamor_create_pixmap(screen,
width,
height,
@@ -1322,11 +2280,11 @@ glamor_convert_gradient_picture(ScreenPtr screen,
return NULL;
dst = CreatePicture(0,
- &pixmap->drawable,
- PictureMatchFormat(screen,
- PIXMAN_FORMAT_DEPTH(format),
- format),
- 0, 0, serverClient, &error);
+ &pixmap->drawable,
+ PictureMatchFormat(screen,
+ PIXMAN_FORMAT_DEPTH(format),
+ format),
+ 0, 0, serverClient, &error);
glamor_destroy_pixmap(pixmap);
if (!dst)
return NULL;
@@ -1334,7 +2292,7 @@ glamor_convert_gradient_picture(ScreenPtr screen,
ValidatePicture(dst);
fbComposite(PictOpSrc, source, NULL, dst, x_source, y_source,
- 0, 0, 0, 0, width, height);
+ 0, 0, 0, 0, width, height);
return dst;
}
--
1.7.7.6
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