[Piglit] [PATCH 4/5] fbo-drawbuffers: Port to use shaders instead of fixed-function

[Ian Romanick]

From: Ian Romanick <ian.d.romanick at intel.com>

Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
---
 tests/fbo/fbo-drawbuffers.c |   42 ++++++++++++++++++++++++++++++++++++++----
 1 files changed, 38 insertions(+), 4 deletions(-)

diff --git a/tests/fbo/fbo-drawbuffers.c b/tests/fbo/fbo-drawbuffers.c
index 36e057c..921a9af 100644
--- a/tests/fbo/fbo-drawbuffers.c
+++ b/tests/fbo/fbo-drawbuffers.c
@@ -38,6 +38,29 @@ int piglit_width = 128;
 int piglit_height = 128;
 int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
 
+const char *vs_text =
+	"attribute vec2 texcoord;\n"
+	"varying vec2 tc;\n"
+	"void main() { gl_Position = gl_Vertex; tc = texcoord; }"
+	;
+
+const char *fs1_text =
+	"void main()\n"
+	"{\n"
+	"    gl_FragData[0] = vec4(0.0, 1.0, 0.0, 1.0);\n"
+	"    gl_FragData[1] = vec4(0.0, 1.0, 0.0, 1.0);\n"
+	"}\n"
+	;
+
+const char *fs2_text =
+	"uniform sampler2D tex;\n"
+	"varying vec2 tc;\n"
+	"void main() { gl_FragColor = texture2D(tex, tc); }"
+	;
+
+static GLint prog_mrt;
+static GLint prog;
+
 static GLuint
 attach_texture(int i)
 {
@@ -92,19 +115,17 @@ piglit_display(void)
 	glClearColor(1.0, 0.0, 0.0, 0.0);
 	glClear(GL_COLOR_BUFFER_BIT);
 
-	glColor4fv(green);
+	piglit_UseProgram(prog_mrt);
 	piglit_draw_rect(-1, -1, 2, 2);
 
 	piglit_BindFramebuffer(GL_FRAMEBUFFER, 0);
 
 	/* Draw the two green textures to halves of the window. */
-	glEnable(GL_TEXTURE_2D);
-	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+	piglit_UseProgram(prog);
 	glBindTexture(GL_TEXTURE_2D, tex0);
 	piglit_draw_rect_tex(-1, -1, 1, 2,  0, 0, 1, 1);
 	glBindTexture(GL_TEXTURE_2D, tex1);
 	piglit_draw_rect_tex(0, -1, 1, 2, 0, 0, 1, 1);
-	glDisable(GL_TEXTURE_2D);
 	glDeleteTextures(1, &tex0);
 	glDeleteTextures(1, &tex1);
 	piglit_DeleteFramebuffers(1, &fb);
@@ -121,11 +142,24 @@ void
 piglit_init(int argc, char **argv)
 {
 	GLint num;
+	GLuint vs, fs;
 
+	piglit_require_GLSL();
 	piglit_require_fbo();
 	piglit_require_extension("GL_ARB_draw_buffers");
 
 	glGetIntegerv(GL_MAX_DRAW_BUFFERS_ARB, &num);
 	if (num < 2)
 		piglit_report_result(PIGLIT_SKIP);
+
+	vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_text);
+	fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs2_text);
+	prog = piglit_link_simple_program(vs, fs);
+
+	piglit_BindAttribLocation(prog, PIGLIT_ATTRIB_TEX, "texcoord");
+	piglit_LinkProgram(prog);
+	piglit_link_check_status(prog);
+
+	fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs1_text);
+	prog_mrt = piglit_link_simple_program(vs, fs);
 }
-- 
1.7.6