Use calculated MVP directly in shader params.

gfx/context/ps3_ctx.c

@@ -356,34 +356,19 @@ const char *ps3_get_resolution_label(uint32_t resolution)
 
 void gfx_ctx_set_projection(gl_t *gl, const struct gl_ortho *ortho, bool allow_rotate)
 {
-   glMatrixMode(GL_PROJECTION);
-   glLoadIdentity();
+   // Calculate projection.
+   math_matrix proj;
+   matrix_ortho(&proj, ortho->left, ortho->right,
+         ortho->bottom, ortho->top, ortho->znear, ortho->zfar);
 
    if (allow_rotate)
    {
-      switch (gl->rotation)
-      {
-         case 90:
-            vertex_ptr = vertexes_90;
-            break;
-         case 180:
-            vertex_ptr = vertexes_180;
-            break;
-         case 270:
-            vertex_ptr = vertexes_270;
-            break;
-         case 0:
-         default:
-            vertex_ptr = default_vertex_ptr;
-            break;
-      }
+      math_matrix rot;
+      matrix_rotate_z(&rot, M_PI * gl->rotation / 180.0f);
+      matrix_multiply(&proj, &rot, &proj);
    }
 
-   glVertexPointer(2, GL_FLOAT, 0, vertex_ptr);
-
-   glOrtho(ortho->left, ortho->right, ortho->bottom, ortho->top, ortho->znear, ortho->zfar);
-   glMatrixMode(GL_MODELVIEW);
-   glLoadIdentity();
+   gl->mvp = proj;
 }
 
 void gfx_ctx_set_aspect_ratio(void *data, unsigned aspectratio_index)

gfx/context/sdl_ctx.c

@@ -466,6 +466,8 @@ void gfx_ctx_set_projection(gl_t *gl, const struct gl_ortho *ortho, bool allow_r
    // TODO: Explicitly setting matrix modes is not used for GLES 2.0.
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
+
+   gl->mvp = proj;
 }
 #endif
 

gfx/gl.c

@@ -203,14 +203,14 @@ static inline void gl_shader_deinit(void)
 #endif
 }
 
-static inline void gl_shader_set_proj_matrix(void)
+static inline void gl_shader_set_proj_matrix(const math_matrix *mat)
 {
 #ifdef HAVE_CG
-   gl_cg_set_proj_matrix();
+   gl_cg_set_proj_matrix(mat);
 #endif
 
 #ifdef HAVE_XML
-   gl_glsl_set_proj_matrix();
+   gl_glsl_set_proj_matrix(mat);
 #endif
 }
 
@@ -440,7 +440,7 @@ void gl_set_projection(gl_t *gl, struct gl_ortho *ortho, bool allow_rotate)
 #endif
 
    gfx_ctx_set_projection(gl, ortho, allow_rotate);
-   gl_shader_set_proj_matrix();
+   gl_shader_set_proj_matrix(&gl->mvp);
 }
 
 void gl_set_viewport(gl_t *gl, unsigned width, unsigned height, bool force_full, bool allow_rotate)

gfx/gl_common.h

@@ -18,6 +18,7 @@
 
 #include "../general.h"
 #include "fonts/fonts.h"
+#include "math/matrix.h"
 
 #ifdef HAVE_CONFIG_H
 #include "../config.h"
@@ -179,6 +180,7 @@ typedef struct gl
    unsigned last_height[TEXTURES];
    unsigned tex_w, tex_h;
    GLfloat tex_coords[8];
+   math_matrix mvp;
 
 #ifdef __CELLOS_LV2__
    GLuint pbo;

gfx/shader_cg.c

@@ -149,10 +149,10 @@ static void gl_cg_reset_attrib(void)
    cg_attrib_index = 0;
 }
 
-void gl_cg_set_proj_matrix(void)
+void gl_cg_set_proj_matrix(const math_matrix *mat)
 {
    if (cg_active && prg[active_index].mvp)
-      cgGLSetStateMatrixParameter(prg[active_index].mvp, CG_GL_MODELVIEW_PROJECTION_MATRIX, CG_GL_MATRIX_IDENTITY);
+      cgGLSetMatrixParameterfc(prg[active_index].mvp, mat->data);
 }
 
 #define set_param_2f(param, x, y) \

gfx/shader_cg.h

@@ -19,6 +19,7 @@
 
 #include "../boolean.h"
 #include "gl_common.h"
+#include "math/matrix.h"
 #include <stdint.h>
 
 bool gl_cg_init(const char *path);
@@ -26,7 +27,7 @@ bool gl_cg_reinit(const char *path);
 
 void gl_cg_deinit(void);
 
-void gl_cg_set_proj_matrix(void);
+void gl_cg_set_proj_matrix(const math_matrix *mat);
 
 void gl_cg_set_params(unsigned width, unsigned height, 
       unsigned tex_width, unsigned tex_height, 

gfx/shader_glsl.c

@@ -1225,8 +1225,12 @@ void gl_glsl_set_params(unsigned width, unsigned height,
    }
 }
 
-void gl_glsl_set_proj_matrix(void)
-{}
+void gl_glsl_set_proj_matrix(const math_matrix *mat)
+{
+   // If we're using FF-based GL, this matrix
+   // will be implicitly passed to the shader.
+   (void)mat;
+}
 
 void gl_glsl_use(unsigned index)
 {

gfx/shader_glsl.h

@@ -19,12 +19,13 @@
 
 #include "../boolean.h"
 #include "gl_common.h"
+#include "math/matrix.h"
 
 bool gl_glsl_init(const char *path);
 
 void gl_glsl_deinit(void);
 
-void gl_glsl_set_proj_matrix(void);
+void gl_glsl_set_proj_matrix(const math_matrix *mat);
 
 void gl_glsl_set_params(unsigned width, unsigned height, 
       unsigned tex_width, unsigned tex_height,