matrix: use 2D matrices

3 files changed, 51 insertions, 53 deletions

diff --git a/render/gles2/renderer.c b/render/gles2/renderer.c
index 9134a2fd..e0a98d29 100644
--- a/render/gles2/renderer.c
+++ b/render/gles2/renderer.c
@@ -85,11 +85,13 @@ static void init_default_shaders() {
 	if (!compile_program(quad_vertex_src, quad_fragment_src, &shaders.quad)) {
 		goto error;
 	}
-	if (!compile_program(quad_vertex_src, ellipse_fragment_src, &shaders.ellipse)) {
+	if (!compile_program(quad_vertex_src, ellipse_fragment_src,
+			&shaders.ellipse)) {
 		goto error;
 	}
 	if (glEGLImageTargetTexture2DOES) {
-		if (!compile_program(quad_vertex_src, fragment_src_external, &shaders.external)) {
+		if (!compile_program(quad_vertex_src, fragment_src_external,
+				&shaders.external)) {
 			goto error;
 		}
 	}
@@ -170,16 +172,16 @@ static void draw_quad() {
 	GL_CALL(glDisableVertexAttribArray(1));
 }
 
-static bool wlr_gles2_render_texture(struct wlr_renderer *wlr_renderer,
-		struct wlr_texture *texture, const float matrix[static 16],
-		float alpha) {
+static bool wlr_gles2_render_texture_with_matrix(
+		struct wlr_renderer *wlr_renderer, struct wlr_texture *texture,
+		const float matrix[static 9], float alpha) {
 	if (!texture || !texture->valid) {
 		wlr_log(L_ERROR, "attempt to render invalid texture");
 		return false;
 	}
 
 	wlr_texture_bind(texture);
-	GL_CALL(glUniformMatrix4fv(0, 1, GL_FALSE, matrix));
+	GL_CALL(glUniformMatrix3fv(0, 1, GL_FALSE, matrix));
 	GL_CALL(glUniform1f(2, alpha));
 	draw_quad();
 	return true;
@@ -187,17 +189,17 @@ static bool wlr_gles2_render_texture(struct wlr_renderer *wlr_renderer,
 
 
 static void wlr_gles2_render_quad(struct wlr_renderer *wlr_renderer,
-		const float color[static 4], const float matrix[static 16]) {
+		const float color[static 4], const float matrix[static 9]) {
 	GL_CALL(glUseProgram(shaders.quad));
-	GL_CALL(glUniformMatrix4fv(0, 1, GL_FALSE, matrix));
+	GL_CALL(glUniformMatrix3fv(0, 1, GL_FALSE, matrix));
 	GL_CALL(glUniform4f(1, color[0], color[1], color[2], color[3]));
 	draw_quad();
 }
 
 static void wlr_gles2_render_ellipse(struct wlr_renderer *wlr_renderer,
-		const float color[static 4], const float matrix[static 16]) {
+		const float color[static 4], const float matrix[static 9]) {
 	GL_CALL(glUseProgram(shaders.ellipse));
-	GL_CALL(glUniformMatrix4fv(0, 1, GL_TRUE, matrix));
+	GL_CALL(glUniformMatrix3fv(0, 1, GL_TRUE, matrix));
 	GL_CALL(glUniform4f(1, color[0], color[1], color[2], color[3]));
 	draw_quad();
 }
@@ -258,7 +260,7 @@ static struct wlr_renderer_impl wlr_renderer_impl = {
 	.clear = wlr_gles2_clear,
 	.scissor = wlr_gles2_scissor,
 	.texture_create = wlr_gles2_texture_create,
-	.render_with_matrix = wlr_gles2_render_texture,
+	.render_texture_with_matrix = wlr_gles2_render_texture_with_matrix,
 	.render_quad = wlr_gles2_render_quad,
 	.render_ellipse = wlr_gles2_render_ellipse,
 	.formats = wlr_gles2_formats,
diff --git a/render/gles2/shaders.c b/render/gles2/shaders.c
index 46a10248..9d3a67c2 100644
--- a/render/gles2/shaders.c
+++ b/render/gles2/shaders.c
@@ -3,29 +3,29 @@
 
 // Colored quads
 const GLchar quad_vertex_src[] =
-"uniform mat4 proj;"
+"uniform mat3 proj;"
 "uniform vec4 color;"
 "attribute vec2 pos;"
 "attribute vec2 texcoord;"
 "varying vec4 v_color;"
 "varying vec2 v_texcoord;"
-"mat4 transpose(in mat4 inMatrix) {"
-"    vec4 i0 = inMatrix[0];"
-"    vec4 i1 = inMatrix[1];"
-"    vec4 i2 = inMatrix[2];"
-"    vec4 i3 = inMatrix[3];"
-"    mat4 outMatrix = mat4("
-"                 vec4(i0.x, i1.x, i2.x, i3.x),"
-"                 vec4(i0.y, i1.y, i2.y, i3.y),"
-"                 vec4(i0.z, i1.z, i2.z, i3.z),"
-"                 vec4(i0.w, i1.w, i2.w, i3.w)"
-"                 );"
-"    return outMatrix;"
+""
+"mat3 transpose(in mat3 inMatrix) {"
+"	vec3 i0 = inMatrix[0];"
+"	vec3 i1 = inMatrix[1];"
+"	vec3 i2 = inMatrix[2];"
+"	mat3 outMatrix = mat3("
+"		vec3(i0.x, i1.x, i2.x),"
+"		vec3(i0.y, i1.y, i2.y),"
+"		vec3(i0.z, i1.z, i2.z)"
+"	);"
+"	return outMatrix;"
 "}"
+""
 "void main() {"
-"  gl_Position = transpose(proj) * vec4(pos, 0.0, 1.0);"
-"  v_color = color;"
-"  v_texcoord = texcoord;"
+"	gl_Position = vec4(transpose(proj) * vec3(pos, 1.0), 1.0);"
+"	v_color = color;"
+"	v_texcoord = texcoord;"
 "}";
 
 const GLchar quad_fragment_src[] =
@@ -49,26 +49,25 @@ const GLchar ellipse_fragment_src[] =
 
 // Textured quads
 const GLchar vertex_src[] =
-"uniform mat4 proj;"
+"uniform mat3 proj;"
 "attribute vec2 pos;"
 "attribute vec2 texcoord;"
 "varying vec2 v_texcoord;"
-"mat4 transpose(in mat4 inMatrix) {"
-"    vec4 i0 = inMatrix[0];"
-"    vec4 i1 = inMatrix[1];"
-"    vec4 i2 = inMatrix[2];"
-"    vec4 i3 = inMatrix[3];"
-"    mat4 outMatrix = mat4("
-"                 vec4(i0.x, i1.x, i2.x, i3.x),"
-"                 vec4(i0.y, i1.y, i2.y, i3.y),"
-"                 vec4(i0.z, i1.z, i2.z, i3.z),"
-"                 vec4(i0.w, i1.w, i2.w, i3.w)"
-"                 );"
 ""
-"    return outMatrix;"
+"mat3 transpose(in mat3 inMatrix) {"
+"	vec3 i0 = inMatrix[0];"
+"	vec3 i1 = inMatrix[1];"
+"	vec3 i2 = inMatrix[2];"
+"	mat3 outMatrix = mat3("
+"		vec3(i0.x, i1.x, i2.x),"
+"		vec3(i0.y, i1.y, i2.y),"
+"		vec3(i0.z, i1.z, i2.z)"
+"	);"
+"	return outMatrix;"
 "}"
+""
 "void main() {"
-"	gl_Position = transpose(proj) * vec4(pos, 0.0, 1.0);"
+"	gl_Position = vec4(transpose(proj) * vec3(pos, 1.0), 1.0);"
 "	v_texcoord = texcoord;"
 "}";
 
@@ -87,8 +86,8 @@ const GLchar fragment_src_rgbx[] =
 "uniform sampler2D tex;"
 "uniform float alpha;"
 "void main() {"
-"   gl_FragColor.rgb = alpha * texture2D(tex, v_texcoord).rgb;"
-"   gl_FragColor.a = alpha;"
+"	gl_FragColor.rgb = alpha * texture2D(tex, v_texcoord).rgb;"
+"	gl_FragColor.a = alpha;"
 "}";
 
 const GLchar fragment_src_external[] =
@@ -97,6 +96,6 @@ const GLchar fragment_src_external[] =
 "varying vec2 v_texcoord;"
 "uniform samplerExternalOES texture0;"
 "void main() {"
-"  vec4 col = texture2D(texture0, v_texcoord);"
-"  gl_FragColor = vec4(col.rgb, col.a);"
+"	vec4 col = texture2D(texture0, v_texcoord);"
+"	gl_FragColor = vec4(col.rgb, col.a);"
 "}";
diff --git a/render/gles2/texture.c b/render/gles2/texture.c
index 0dfebc48..9ee2a3e3 100644
--- a/render/gles2/texture.c
+++ b/render/gles2/texture.c
@@ -227,16 +227,13 @@ static bool gles2_texture_upload_eglimage(struct wlr_texture *wlr_tex,
 }
 
 static void gles2_texture_get_matrix(struct wlr_texture *_texture,
-		float mat[static 16], const float projection[static 16], int x, int y) {
+		float mat[static 9], const float projection[static 9], int x, int y) {
 	struct wlr_gles2_texture *texture = (struct wlr_gles2_texture *)_texture;
-	float world[16];
 	wlr_matrix_identity(mat);
-	wlr_matrix_translate(world, x, y, 0);
-	wlr_matrix_mul(mat, mat, world);
-	wlr_matrix_scale(world,
-			texture->wlr_texture.width, texture->wlr_texture.height, 1);
-	wlr_matrix_mul(mat, mat, world);
-	wlr_matrix_mul(mat, projection, mat);
+	wlr_matrix_translate(mat, x, y);
+	wlr_matrix_scale(mat, texture->wlr_texture.width,
+		texture->wlr_texture.height);
+	wlr_matrix_multiply(mat, projection, mat);
 }
 
 static void gles2_texture_get_buffer_size(struct wlr_texture *texture, struct