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tests/cogl: Migrate premult test
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2555>
This commit is contained in:
Jonas Ådahl
@@ -9,6 +9,7 @@ cogl_tests = [
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'test-pipeline-user-matrix',
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'test-pipeline-uniforms',
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'test-pixel-buffer',
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'test-premult',
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]
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cogl_test_conformance_includes = [
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288
src/tests/cogl/conform/test-premult.c
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288
src/tests/cogl/conform/test-premult.c
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@@ -0,0 +1,288 @@
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#include <cogl/cogl.h>
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#include <string.h>
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#include "tests/cogl-test-utils.h"
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#define QUAD_WIDTH 32
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#define RED 0
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#define GREEN 1
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#define BLUE 2
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#define ALPHA 3
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#define MASK_RED(COLOR) ((COLOR & 0xff000000) >> 24)
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#define MASK_GREEN(COLOR) ((COLOR & 0xff0000) >> 16)
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#define MASK_BLUE(COLOR) ((COLOR & 0xff00) >> 8)
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#define MASK_ALPHA(COLOR) (COLOR & 0xff)
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typedef enum _MakeTextureFlags
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{
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TEXTURE_FLAG_SET_PREMULTIPLIED = 1,
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TEXTURE_FLAG_SET_UNPREMULTIPLIED = 1<<1,
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} MakeTextureFlags;
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static guchar *
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gen_tex_data (uint32_t color)
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{
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guchar *tex_data, *p;
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uint8_t r = MASK_RED (color);
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uint8_t g = MASK_GREEN (color);
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uint8_t b = MASK_BLUE (color);
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uint8_t a = MASK_ALPHA (color);
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tex_data = g_malloc (QUAD_WIDTH * QUAD_WIDTH * 4);
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for (p = tex_data + QUAD_WIDTH * QUAD_WIDTH * 4; p > tex_data;)
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{
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*(--p) = a;
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*(--p) = b;
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*(--p) = g;
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*(--p) = r;
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}
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return tex_data;
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}
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static CoglTexture *
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make_texture (uint32_t color,
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CoglPixelFormat src_format,
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MakeTextureFlags flags)
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{
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static CoglUserDataKey bitmap_free_key;
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CoglTexture2D *tex_2d;
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guchar *tex_data = gen_tex_data (color);
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CoglBitmap *bmp = cogl_bitmap_new_for_data (test_ctx,
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QUAD_WIDTH,
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QUAD_WIDTH,
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src_format,
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QUAD_WIDTH * 4,
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tex_data);
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cogl_object_set_user_data (COGL_OBJECT (bmp),
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&bitmap_free_key,
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tex_data,
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g_free);
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tex_2d = cogl_texture_2d_new_from_bitmap (bmp);
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if (flags & TEXTURE_FLAG_SET_PREMULTIPLIED)
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cogl_texture_set_premultiplied (tex_2d, TRUE);
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else if (flags & TEXTURE_FLAG_SET_UNPREMULTIPLIED)
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cogl_texture_set_premultiplied (tex_2d, FALSE);
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cogl_object_unref (bmp);
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return tex_2d;
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}
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static void
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set_region (CoglTexture *tex,
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uint32_t color,
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CoglPixelFormat format)
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{
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guchar *tex_data = gen_tex_data (color);
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cogl_texture_set_region (tex,
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0, 0, /* src x, y */
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0, 0, /* dst x, y */
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QUAD_WIDTH, QUAD_WIDTH, /* dst width, height */
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QUAD_WIDTH, QUAD_WIDTH, /* src width, height */
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format,
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0, /* auto compute row stride */
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tex_data);
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}
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static void
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check_texture (CoglPipeline *pipeline,
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int x,
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int y,
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CoglTexture *tex,
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uint32_t expected_result)
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{
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/* New API */
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cogl_pipeline_set_layer_texture (pipeline, 0, tex);
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cogl_framebuffer_draw_rectangle (test_fb, pipeline,
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x * QUAD_WIDTH,
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y * QUAD_WIDTH,
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x * QUAD_WIDTH + QUAD_WIDTH,
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y * QUAD_WIDTH + QUAD_WIDTH);
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test_utils_check_pixel (test_fb, x * QUAD_WIDTH + QUAD_WIDTH / 2, y * QUAD_WIDTH + QUAD_WIDTH / 2, expected_result);
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}
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static void
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test_premult (void)
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{
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CoglPipeline *pipeline;
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CoglTexture *tex;
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cogl_framebuffer_orthographic (test_fb, 0, 0,
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cogl_framebuffer_get_width (test_fb),
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cogl_framebuffer_get_height (test_fb),
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-1,
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100);
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cogl_framebuffer_clear4f (test_fb,
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COGL_BUFFER_BIT_COLOR,
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1.0f, 1.0f, 1.0f, 1.0f);
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/* New API */
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pipeline = cogl_pipeline_new (test_ctx);
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cogl_pipeline_set_blend (pipeline,
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"RGBA = ADD (SRC_COLOR, 0)", NULL);
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cogl_pipeline_set_layer_combine (pipeline, 0,
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"RGBA = REPLACE (TEXTURE)", NULL);
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/* If the user explicitly specifies an unmultiplied internal format then
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* Cogl shouldn't automatically premultiply the given texture data... */
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if (cogl_test_verbose ())
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g_print ("make_texture (0xff00ff80, "
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"src = RGBA_8888, internal = RGBA_8888)\n");
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tex = make_texture (0xff00ff80,
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COGL_PIXEL_FORMAT_RGBA_8888, /* src format */
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TEXTURE_FLAG_SET_UNPREMULTIPLIED);
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check_texture (pipeline, 0, 0, /* position */
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tex,
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0xff00ff80); /* expected */
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/* If the user explicitly requests a premultiplied internal format and
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* gives unmultiplied src data then Cogl should always premultiply that
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* for us */
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if (cogl_test_verbose ())
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g_print ("make_texture (0xff00ff80, "
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"src = RGBA_8888, internal = RGBA_8888_PRE)\n");
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tex = make_texture (0xff00ff80,
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COGL_PIXEL_FORMAT_RGBA_8888, /* src format */
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TEXTURE_FLAG_SET_PREMULTIPLIED);
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check_texture (pipeline, 1, 0, /* position */
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tex,
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0x80008080); /* expected */
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/* If the user doesn't explicitly declare that the texture is premultiplied
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* then Cogl should assume it is by default should premultiply
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* unpremultiplied texture data...
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*/
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if (cogl_test_verbose ())
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g_print ("make_texture (0xff00ff80, "
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"src = RGBA_8888, internal = ANY)\n");
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tex = make_texture (0xff00ff80,
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COGL_PIXEL_FORMAT_RGBA_8888, /* src format */
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0); /* default premultiplied status */
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check_texture (pipeline, 2, 0, /* position */
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tex,
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0x80008080); /* expected */
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/* If the user requests a premultiplied internal texture format and supplies
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* premultiplied source data, Cogl should never modify that source data...
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*/
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if (cogl_test_verbose ())
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g_print ("make_texture (0x80008080, "
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"src = RGBA_8888_PRE, "
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"internal = RGBA_8888_PRE)\n");
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tex = make_texture (0x80008080,
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COGL_PIXEL_FORMAT_RGBA_8888_PRE, /* src format */
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TEXTURE_FLAG_SET_PREMULTIPLIED);
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check_texture (pipeline, 3, 0, /* position */
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tex,
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0x80008080); /* expected */
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/* If the user requests an unmultiplied internal texture format, but
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* supplies premultiplied source data, then Cogl should always
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* un-premultiply the source data... */
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if (cogl_test_verbose ())
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g_print ("make_texture (0x80008080, "
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"src = RGBA_8888_PRE, internal = RGBA_8888)\n");
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tex = make_texture (0x80008080,
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COGL_PIXEL_FORMAT_RGBA_8888_PRE, /* src format */
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TEXTURE_FLAG_SET_UNPREMULTIPLIED);
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check_texture (pipeline, 4, 0, /* position */
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tex,
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0xff00ff80); /* expected */
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/* If the user allows any internal texture format and provides premultipled
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* source data then by default Cogl shouldn't modify the source data...
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* (In the future there will be additional Cogl API to control this
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* behaviour) */
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if (cogl_test_verbose ())
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g_print ("make_texture (0x80008080, "
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"src = RGBA_8888_PRE, internal = ANY)\n");
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tex = make_texture (0x80008080,
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COGL_PIXEL_FORMAT_RGBA_8888_PRE, /* src format */
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0); /* default premultiplied status */
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check_texture (pipeline, 5, 0, /* position */
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tex,
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0x80008080); /* expected */
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/*
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* Test cogl_texture_set_region() ....
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*/
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if (cogl_test_verbose ())
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g_print ("make_texture (0xDEADBEEF, "
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"src = RGBA_8888, internal = RGBA_8888)\n");
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tex = make_texture (0xDEADBEEF,
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COGL_PIXEL_FORMAT_RGBA_8888, /* src format */
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TEXTURE_FLAG_SET_UNPREMULTIPLIED);
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if (cogl_test_verbose ())
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g_print ("set_region (0xff00ff80, RGBA_8888)\n");
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set_region (tex, 0xff00ff80, COGL_PIXEL_FORMAT_RGBA_8888);
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check_texture (pipeline, 6, 0, /* position */
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tex,
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0xff00ff80); /* expected */
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/* Updating a texture region for an unmultiplied texture using premultiplied
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* region data should result in Cogl unmultiplying the given region data...
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*/
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if (cogl_test_verbose ())
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g_print ("make_texture (0xDEADBEEF, "
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"src = RGBA_8888, internal = RGBA_8888)\n");
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tex = make_texture (0xDEADBEEF,
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COGL_PIXEL_FORMAT_RGBA_8888, /* src format */
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TEXTURE_FLAG_SET_UNPREMULTIPLIED);
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if (cogl_test_verbose ())
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g_print ("set_region (0x80008080, RGBA_8888_PRE)\n");
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set_region (tex, 0x80008080, COGL_PIXEL_FORMAT_RGBA_8888_PRE);
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check_texture (pipeline, 7, 0, /* position */
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tex,
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0xff00ff80); /* expected */
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if (cogl_test_verbose ())
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g_print ("make_texture (0xDEADBEEF, "
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"src = RGBA_8888_PRE, "
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"internal = RGBA_8888_PRE)\n");
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tex = make_texture (0xDEADBEEF,
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COGL_PIXEL_FORMAT_RGBA_8888_PRE, /* src format */
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TEXTURE_FLAG_SET_PREMULTIPLIED);
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if (cogl_test_verbose ())
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g_print ("set_region (0x80008080, RGBA_8888_PRE)\n");
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set_region (tex, 0x80008080, COGL_PIXEL_FORMAT_RGBA_8888_PRE);
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check_texture (pipeline, 8, 0, /* position */
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tex,
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0x80008080); /* expected */
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/* Updating a texture region for a premultiplied texture using unmultiplied
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* region data should result in Cogl premultiplying the given region data...
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*/
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if (cogl_test_verbose ())
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g_print ("make_texture (0xDEADBEEF, "
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"src = RGBA_8888_PRE, "
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"internal = RGBA_8888_PRE)\n");
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tex = make_texture (0xDEADBEEF,
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COGL_PIXEL_FORMAT_RGBA_8888_PRE, /* src format */
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TEXTURE_FLAG_SET_PREMULTIPLIED);
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if (cogl_test_verbose ())
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g_print ("set_region (0xff00ff80, RGBA_8888)\n");
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set_region (tex, 0xff00ff80, COGL_PIXEL_FORMAT_RGBA_8888);
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check_texture (pipeline, 9, 0, /* position */
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tex,
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0x80008080); /* expected */
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if (cogl_test_verbose ())
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g_print ("OK\n");
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}
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COGL_TEST_SUITE (
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g_test_add_func ("/premult", test_premult);
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)
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